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  #1  
Old 02-13-2010, 05:25 PM
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I use to run 2 250W 15000XM single end bulbs. They Has a nice crisp white and a good cool blue too. I liked them but I think the would of performed better on a Electronic Ballast. Lower the kelvins 10000k more of the yellow color.
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Old 02-13-2010, 06:36 PM
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I used to run XM 10K bulbs on electronic balasts. I have run them on magnetic ballasts too. They are extrememly bright and start out very white, but tend to lean a little to the yellow over time. They definitely do not lean toward the blue side of white in my experience.
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Old 02-13-2010, 08:27 PM
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So long as they gradually lean to yellow and start out white that is ok. I would be running 4 blue t5 bulbs to bring the colour temp up. If they were always pretty yellow I might have troubles achieving the look I'm after.

Did your 10ks look the same but brighter on magnetic? Was it m80?

Thx
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Old 02-13-2010, 09:24 PM
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I have 10k xm moguls with my m80 ballasts and no supplemental actinics and I love the colour.... no trace of yellow at all. They are very, very bright
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Old 02-13-2010, 09:27 PM
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This is pretty accurate pic of the colour and the bulbs are just over a year old
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Old 02-13-2010, 10:19 PM
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Oh nice I'm a big fan of your tank so win/win!

Do you think one bulb is enough over my tank? How high should it be?

Thanks!
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Old 02-13-2010, 11:19 PM
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hey there Brett why not go with a 400 2 over the tank on a lumenarc reflector.
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